Just went through the “delete the entire IntelliJ cache” routine again. This time for some reason IntelliJ couldn’t resolve top level functions in

kotlinx.coroutines

like

kotlinx.coroutines.delay

. Reimporting the gradle project didn’t help, and the gradle project window showed the project as having org.jetbrains.kotlinxkotlinx coroutines core1.4.3 & org.jetbrains.kotlinxkotlinx coroutines core jvm1.4.3 on the classpath - still got the dreaded red font. Feels like IntelliJ’s quality control has really gone backwards in the last year or two.